Anti-dew heater controller & bands
Keep dew off your optics — telescope, binoculars, corrector plates, eyepieces — with a reliable, interference-free heater controller and custom-fit heating bands from Lunaticoastro. In production since 2006 and trusted by astronomers worldwide.
Moisture settling on your optics ruins images and can damage coatings. The ZeroDew controller keeps all your heating bands running at exactly the right power level — silently, interference-free and automatically.
Four independently regulated outputs let you run heater bands on different elements simultaneously: primary mirror, corrector plate, finder, eyepieces and more.
In continuous production since 2006, ZeroDew has been protecting observatories for nearly two decades. It simply does not fail — night after night, year after year, wherever in the world it is deployed.
| Input voltage | 12V DC |
| Output voltage | 0 – 12V variable |
| Outputs | 4 regulated channels |
| Max current | 10A total |
| Technology | PWM at 13 Hz |
| Protection | Reverse polarity + battery discharge LED |
| Compliance | RoHS |
PWM technology keeps output interference-free — no noise in your images, no interference with radio equipment at the eyepiece.
Each channel is independently regulated from 0 to 12V — run different bands at different power levels from a single controller.
Pulse Width Modulation at 13 Hz delivers precise power control without generating electrical interference. No noise in your images or radio gear.
Connect via car lighter socket, batteries with FASTON connectors, banana plugs, or standard 5.2mm jack from any 12V DC supply.
Reverse polarity protection means accidental reversed connections won't damage the unit. Battery discharge LED warns before you drain your power source.
ZeroDew works with Lunatico's own custom-fit bands and with any existing resistor heater bands you already own.
Custom-fit bands designed for telescopes and binoculars. Available in a range of sizes for objective lenses, corrector plates, eyepieces and finders. Connect directly to the ZeroDew controller via RCA jack.
Alternative band type using USB connectors. Refer to the documentation for specific usage guidelines and compatibility details.
Already own heater bands from another brand? The ZeroDew controller is compatible with all standard resistor heater bands — just connect and control.
ZeroDew bands can be powered and controlled through the DragonFly observatory controller, adding dew management to your automated observatory setup.
Free shipping to most countries on direct orders. · Dealers worldwide →
